Here's what Joche said when he moved to the Rx.
http://flyingjochen.blogspot.it/search? ... results=41
He failed the looping due to the lack of airspeed and maybe the different pitch behaviour of the Combat.
Anyway, a lot of things changed from the 2012/14 alu Combats versions and the new carbon ones, just like any other wing from any other brand since then.
The tail it's an aerodynamict fact,you can clearly see on many aircrafts.
Even though a hangglider is a full-wing body,the tail adds stability, with increased flight pleasure in turbulent air and straight,fast glides.
Combats haven't got tip wands,so the 'bar pressure' concept hasn't to be misunderstood with pitch stability.
You can still get bar pressure on any elliptic wing with sprogs settings out of certification's settings (very low) and a lot of twist at the tip wands, but that's not going to be a safe wing.
So, let's stay open-minded.
It's no secret that the wings with the tail have passed the pitch test at lower sprogs settings.
Airfoils and sails have been adjusted to work with the tail, too, so even if I can put a tail kit on any wing, it has been designed for Combats and works best with them.